Improvement in picture-nails



PATENT DEEIcE;

HUBERT L. JUDD, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN PICTURE-NAILS.

Specification forming part of Letters Patent No. 119,273, datedSeptember 26, 1871.

To all whom t may concern.'

Beit known that I, HUBERT L. JUDD, of Brook- "lyn, in the county ofKings and State of New thick enough to receive such screw-thread, and`the cutting thereof is a considerable item of expense. p

My invention is made for the purpose of cheapening the manufacture andproducing astron ger and more reliable screw-thread; and consists in ahead with a sheet-metal back, and` a hole for the screw of a size to tthe base of the thread, anda notch for therib of the thread vitself topass through.

In the drawing, Fig. 1 is a section of the nail and head-separately.Fig. 2 is a rear View of the head; and Fig. 3 is a section, in largersize,

illustrating the manner in which the screw-thread is formed.

The nail a is to be of the ordinary character, with a screw-thread, b,near one end and apoint, c, near the other. The ornamental headis madeof the porcelain or other disk d, of any desired character, and thesheet-metal back eis connected therewith. In this back e there is simplya round hole of a diameter corresponding to the base of the screwthread, so that when the screw is screwed into said hole the edges ofthe sheet metal form the thread and bend slightly to accommodate theinclination. Upon one side of the hole is a notch to allow the rib ofthe screwthread to pass at this point.

I claim as my invention- Thesheet-metal back, with a notched opening toform a screw-thread at the edge of the sheet metal, as set forth.

Signed byme this 18th dayoi' May, A. D. 1871.

HUBERT L. J UDD.

Witnesses CEAS. H. SMITH, GEO. T. PINOKNEY.

